diff --git a/src/dotnet/Core/Interfaces/ICoreService.cs b/src/dotnet/Core/Interfaces/ICoreService.cs
index 781bd4a8ca..c7042cc6a5 100644
--- a/src/dotnet/Core/Interfaces/ICoreService.cs
+++ b/src/dotnet/Core/Interfaces/ICoreService.cs
@@ -26,16 +26,16 @@ public interface ICoreService
     /// Creates a new chat session.
     /// </summary>
     /// <param name="instanceId">The instance Id.</param>
-    /// <param name="chatSessionName">The name for the chat session.</param>
-    Task<Session> CreateNewChatSessionAsync(string instanceId, string chatSessionName);
+    /// <param name="sessionName">The name for the chat session.</param>
+    Task<Session> CreateNewChatSessionAsync(string instanceId, string sessionName);
 
     /// <summary>
     /// Rename the chat session from its default (eg., "New Chat") to the summary provided by OpenAI.
     /// </summary>
     /// <param name="instanceId">The instance id.</param>
     /// <param name="sessionId">The session id to rename.</param>
-    /// <param name="newChatSessionName">The new name for the chat session.</param>
-    Task<Session> RenameChatSessionAsync(string instanceId, string sessionId, string newChatSessionName);
+    /// <param name="sessionName">The new name for the chat session.</param>
+    Task<Session> RenameChatSessionAsync(string instanceId, string sessionId, string sessionName);
 
     /// <summary>
     /// Delete a chat session and related messages.
diff --git a/src/dotnet/Core/Interfaces/ICosmosDbService.cs b/src/dotnet/Core/Interfaces/ICosmosDbService.cs
index fb0ce9f8b7..5f4bc81674 100644
--- a/src/dotnet/Core/Interfaces/ICosmosDbService.cs
+++ b/src/dotnet/Core/Interfaces/ICosmosDbService.cs
@@ -80,10 +80,10 @@ public interface ICosmosDbService
     /// Updates a session's name through a patch operation.
     /// </summary>
     /// <param name="id">The session id.</param>
-    /// <param name="name">The session's new name.</param>
+    /// <param name="sessionName">The session's new name.</param>
     /// <param name="cancellationToken">Cancellation token for async calls.</param>
     /// <returns>Revised chat session item.</returns>
-    Task<Session> UpdateSessionNameAsync(string id, string name, CancellationToken cancellationToken = default);
+    Task<Session> UpdateSessionNameAsync(string id, string sessionName, CancellationToken cancellationToken = default);
 
     /// <summary>
     /// Batch create or update chat messages and session.
diff --git a/src/dotnet/Core/Services/CoreService.cs b/src/dotnet/Core/Services/CoreService.cs
index 8b0eb97ba4..35a1b9be58 100644
--- a/src/dotnet/Core/Services/CoreService.cs
+++ b/src/dotnet/Core/Services/CoreService.cs
@@ -1,4 +1,3 @@
-using Azure.Core;
 using FoundationaLLM.Common.Constants;
 using FoundationaLLM.Common.Constants.ResourceProviders;
 using FoundationaLLM.Common.Exceptions;
@@ -66,13 +65,13 @@ public async Task<List<Message>> GetChatSessionMessagesAsync(string instanceId,
     }
 
     /// <inheritdoc/>
-    public async Task<Session> CreateNewChatSessionAsync(string instanceId, string chatSessionName)
+    public async Task<Session> CreateNewChatSessionAsync(string instanceId, string sessionName)
     {
-        ArgumentException.ThrowIfNullOrEmpty(chatSessionName);
+        ArgumentException.ThrowIfNullOrEmpty(sessionName);
 
         Session session = new()
         {
-            Name = chatSessionName,
+            Name = sessionName,
             Type = _sessionType,
             UPN = _callContext.CurrentUserIdentity?.UPN ?? throw new InvalidOperationException("Failed to retrieve the identity of the signed in user when creating a new chat session.")
         };
@@ -80,12 +79,12 @@ public async Task<Session> CreateNewChatSessionAsync(string instanceId, string c
     }
 
     /// <inheritdoc/>
-    public async Task<Session> RenameChatSessionAsync(string instanceId, string sessionId, string newChatSessionName)
+    public async Task<Session> RenameChatSessionAsync(string instanceId, string sessionId, string sessionName)
     {
         ArgumentNullException.ThrowIfNull(sessionId);
-        ArgumentException.ThrowIfNullOrEmpty(newChatSessionName);
+        ArgumentException.ThrowIfNullOrEmpty(sessionName);
 
-        return await _cosmosDbService.UpdateSessionNameAsync(sessionId, newChatSessionName);
+        return await _cosmosDbService.UpdateSessionNameAsync(sessionId, sessionName);
     }
 
     /// <inheritdoc/>
diff --git a/src/dotnet/Core/Services/CosmosDbService.cs b/src/dotnet/Core/Services/CosmosDbService.cs
index 9f42477849..7d9fce832c 100644
--- a/src/dotnet/Core/Services/CosmosDbService.cs
+++ b/src/dotnet/Core/Services/CosmosDbService.cs
@@ -223,14 +223,14 @@ public async Task<Session> UpdateSessionAsync(Session session, CancellationToken
         }
 
         /// <inheritdoc/>
-        public async Task<Session> UpdateSessionNameAsync(string id, string name, CancellationToken cancellationToken = default)
+        public async Task<Session> UpdateSessionNameAsync(string id, string sessionName, CancellationToken cancellationToken = default)
         {
             var response = await _sessions.PatchItemAsync<Session>(
                 id: id,
                 partitionKey: new PartitionKey(id),
                 patchOperations: new[]
                 {
-                    PatchOperation.Set("/name", name),
+                    PatchOperation.Set("/name", sessionName),
                 },
                 cancellationToken: cancellationToken
             );
diff --git a/src/dotnet/CoreAPI/Controllers/SessionsController.cs b/src/dotnet/CoreAPI/Controllers/SessionsController.cs
index faa0c35580..b8604819b5 100644
--- a/src/dotnet/CoreAPI/Controllers/SessionsController.cs
+++ b/src/dotnet/CoreAPI/Controllers/SessionsController.cs
@@ -68,20 +68,20 @@ public async Task<CompletionPrompt> GetCompletionPrompt(string instanceId, strin
         /// Creates a new chat session.
         /// </summary>
         /// <param name="instanceId">The id of the instance.</param>
-        /// <param name="chatSessionName">The name for the chat session.</param>
+        /// <param name="sessionName">The name for the chat session.</param>
         [HttpPost(Name = "CreateNewChatSession")]
-        public async Task<Session> CreateNewChatSession(string instanceId, string chatSessionName) =>
-            await _coreService.CreateNewChatSessionAsync(instanceId, chatSessionName);
+        public async Task<Session> CreateNewChatSession(string instanceId, [FromBody] string sessionName) =>
+            await _coreService.CreateNewChatSessionAsync(instanceId, sessionName);
 
         /// <summary>
         /// Rename the chat session.
         /// </summary>
         /// <param name="instanceId">The id of the instance.</param>
         /// <param name="sessionId">The id of the session to rename.</param>
-        /// <param name="newChatSessionName">The new name for the session.</param>
+        /// <param name="sessionName">The new name for the session.</param>
         [HttpPost("{sessionId}/rename", Name = "RenameChatSession")]
-        public async Task<Session> RenameChatSession(string instanceId, string sessionId, string newChatSessionName) =>
-            await _coreService.RenameChatSessionAsync(instanceId, sessionId, newChatSessionName);
+        public async Task<Session> RenameChatSession(string instanceId, string sessionId, [FromBody] string sessionName) =>
+            await _coreService.RenameChatSessionAsync(instanceId, sessionId, sessionName);
 
         /// <summary>
         /// Delete a chat session and related messages.
diff --git a/src/dotnet/CoreClient/Clients/RESTClients/SessionRESTClient.cs b/src/dotnet/CoreClient/Clients/RESTClients/SessionRESTClient.cs
index 7b7298799a..5cf7b0344a 100644
--- a/src/dotnet/CoreClient/Clients/RESTClients/SessionRESTClient.cs
+++ b/src/dotnet/CoreClient/Clients/RESTClients/SessionRESTClient.cs
@@ -1,7 +1,7 @@
 using Azure.Core;
 using FoundationaLLM.Client.Core.Interfaces;
 using FoundationaLLM.Common.Models.Chat;
-using System.Text.Encodings.Web;
+using System.Net.Http.Json;
 using System.Text.Json;
 
 namespace FoundationaLLM.Client.Core.Clients.RESTClients
@@ -17,10 +17,12 @@ internal class SessionRESTClient(
         private readonly string _instanceId = instanceId ?? throw new ArgumentNullException(nameof(instanceId));
 
         /// <inheritdoc/>
-        public async Task<string> CreateSessionAsync(string chatSessionName)
+        public async Task<string> CreateSessionAsync(string sessionName)
         {
             var coreClient = await GetCoreClientAsync();
-            var responseSession = await coreClient.PostAsync($"instances/{_instanceId}/sessions?chatSessionName={chatSessionName}", null);
+            var responseSession = await coreClient.PostAsync(
+                $"instances/{_instanceId}/sessions",
+                JsonContent.Create(sessionName));
 
             if (responseSession.IsSuccessStatusCode)
             {
@@ -39,7 +41,9 @@ public async Task<string> CreateSessionAsync(string chatSessionName)
         public async Task<string> RenameChatSession(string sessionId, string sessionName)
         {
             var coreClient = await GetCoreClientAsync();
-            var response = await coreClient.PostAsync($"instances/{_instanceId}/sessions/{sessionId}/rename?newChatSessionName={UrlEncoder.Default.Encode(sessionName)}", null);
+            var response = await coreClient.PostAsync(
+                $"instances/{_instanceId}/sessions/{sessionId}/rename",
+                JsonContent.Create(sessionName));
 
             if (response.IsSuccessStatusCode)
             {
diff --git a/src/dotnet/CoreClient/Interfaces/ISessionRESTClient.cs b/src/dotnet/CoreClient/Interfaces/ISessionRESTClient.cs
index 8f6acd8622..ec1763326a 100644
--- a/src/dotnet/CoreClient/Interfaces/ISessionRESTClient.cs
+++ b/src/dotnet/CoreClient/Interfaces/ISessionRESTClient.cs
@@ -25,9 +25,9 @@ public interface ISessionRESTClient
         /// <summary>
         /// Creates a new session with the specified name.
         /// </summary>
-        /// <param name="chatSessionName">The name for the chat session.</param>
+        /// <param name="sessionName">The name for the chat session.</param>
         /// <returns>Returns the new Session ID.</returns>
-        Task<string> CreateSessionAsync(string chatSessionName);
+        Task<string> CreateSessionAsync(string sessionName);
 
         /// <summary>
         /// Renames a chat session.
diff --git a/tests/dotnet/Core.Tests/Services/CoreServiceTests.cs b/tests/dotnet/Core.Tests/Services/CoreServiceTests.cs
index 53c1acbf0b..d361f5a003 100644
--- a/tests/dotnet/Core.Tests/Services/CoreServiceTests.cs
+++ b/tests/dotnet/Core.Tests/Services/CoreServiceTests.cs
@@ -123,8 +123,8 @@ public async Task CreateNewChatSessionAsync_ShouldReturnANewChatSession()
             // Arrange
             var currentUserUPN = "testuser@example.com";
             var sessionType = "Test_type";
-            var chatSessionName = "Test_name";
-            var newSession = new Session { Name = chatSessionName, Type = sessionType, UPN = currentUserUPN };
+            var sessionName = "Test_name";
+            var newSession = new Session { Name = sessionName, Type = sessionType, UPN = currentUserUPN };
 
             // Set up mock returns
             _callContext.CurrentUserIdentity.Returns(new UnifiedUserIdentity { UPN = currentUserUPN });
@@ -133,13 +133,13 @@ public async Task CreateNewChatSessionAsync_ShouldReturnANewChatSession()
                 .Returns(Task.FromResult(newSession));
 
             // Act
-            var resultSession = await _testedService.CreateNewChatSessionAsync(_instanceId, chatSessionName);
+            var resultSession = await _testedService.CreateNewChatSessionAsync(_instanceId, sessionName);
 
             // Assert
             Assert.NotNull(resultSession);
             Assert.Equal(sessionType, resultSession.Type);
             Assert.Equal(currentUserUPN, resultSession.UPN);
-            Assert.Equal(chatSessionName, resultSession.Name);
+            Assert.Equal(sessionName, resultSession.Name);
         }
 
         #endregion
@@ -176,12 +176,12 @@ public async Task RenameChatSessionAsync_ShouldReturnTheRenamedChatSession()
         public async Task RenameChatSessionAsync_ShouldThrowExceptionWhenSessionIdIsNull()
         {
             // Arrange
-            var newChatSessionName = "NewName";
+            var sessionName = "NewName";
 
             // Assert
             await Assert.ThrowsAsync<ArgumentNullException>(async () =>
             {
-                await _testedService.RenameChatSessionAsync(_instanceId, null!, newChatSessionName);
+                await _testedService.RenameChatSessionAsync(_instanceId, null!, sessionName);
             });
         }